Optimization and experiment research of high power linearly polarized radial waveguide array antenna

The performance affecting factors were analyzed to improve the high power linearlypolarized radial waveguide array antenna in its aperture efficiency, reflection and so on. Based on the analysis, three optimization approaches were adopted, i.e., improving the performance of cell antenna, adjusting the layout of array antenna and improving the radial waveguide and probe. Theoretical analysis, numerical simulation and experimental measurement of the array antenna were carried out. The experiment shows that at 1.57 GHz, the voltage standing wave ratio (VSWR) is 1.19, the gain is 17.65 dBi, and the axial ratio is -39.2 dB. In the range of 1.47 to 1.77 GHz, the VSWR is below 1.4.